Controlled Products Systems Group 1150-080 - Manual (Page 18)

1150-065-F-1-11 16
2.6 Secondary Entrapment Protection Wiring
Secondary entrapment prevention devices must be installed to insure a safe operating environment and reduce the risk of
personnel entrapment. Secondary entrapment prevention may be provided by a combination of both type sensors (UL 325 Type
B1 and B2).
Avoid interference
with gate hardware.
• Use only UL listed (or equivalent) sensors.
• Sensors shall be located where the risk of entrapment or obstruction exists, such as the perimeter reachable by a
moving gate or barrier. Additional sensors should be added for additional protection where entrapment zones exist.
Actual placement of sensors is dependent on the installation requirements.
• Inputs from sensors to circuit board are Normally Open (NO).
• Disconnect power to gate operator before installing the sensors.
• Photo-cell should be placed so that an entrapment cannot occur at the lower travel of the gate. Do not place the
photo-cell so high that a person could be trapped under the gate without activating the photo-cell.
• If high bed vehicles access the gate, a second photo-cell should be placed so that the photo-beam cannot scan
under the vehicle.
• Photo-cells may require separate
power depending on model used.
• Hardwired contact sensors must be located and wiring arranged so that the communication
between the sensor and the gate operator is not subjected to mechanical damage.
• Additional contact sensors should be added where multiple entrapment zones may exist.
Non-Contact Sensor (Type B1)
Contact Sensor (Type B2)
NO NC
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Junction
Box
Com
N. O.
High Bed Vehicles (Multiple Beams)
Typical Vehicles (Single Beam)